---

https://web-app.lds-test4.tn.tngrp.ru/lds-api-gateway/hubs/ldsClientHub/negotiate?token=...&xUserId=...&negotiateVersion=1

response
{
    "negotiateVersion": 1,
    "connectionId": "B-LGw9vOqPyOZsOoCVVw0Q",
    "connectionToken": "C2gAR4vb9XK3ITlCzV8ezg",
    "availableTransports": [
        {
            "transport": "WebSockets",
            "transferFormats": [
                "Text",
                "Binary"
            ]
        },
        {
            "transport": "ServerSentEvents",
            "transferFormats": [
                "Text"
            ]
        },
        {
            "transport": "LongPolling",
            "transferFormats": [
                "Text",
                "Binary"
            ]
        }
    ]
}